Time-Dependent Salinity and Temperature Structure of the Columbia River Salt Wedge and River Plume: Analysis of Conductivity/Temperature/Depth Profiles from Sensors Attached to Pinnipeds and Diving Waterbirds

2013 ◽  
Author(s):  
James Lerczak
Keyword(s):  
Columbia River ◽  
River Plume ◽  
Time Dependent ◽  
Temperature Structure ◽  
Salt Wedge ◽  
Depth Profiles ◽  
Temperature Depth

scholarly journals Disturbances of Temperature-Depth Profiles by Surface Warming and Groundwater Flow Convection in Kumamoto Plain, Japan

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Linyao Dong ◽  
Congsheng Fu ◽  
Jigen Liu ◽  
Yifeng Wang
Keyword(s):  
Groundwater Flow ◽  
Subsurface Water ◽  
Subsurface Temperature ◽  
Flow Perturbation ◽  
Surface Warming ◽  
Heat Flows ◽  
Depth Profiles ◽  
Basin Scale ◽  
Thermal Regimes ◽  
Temperature Depth

Subsurface temperatures depend on climate and groundwater flow. A lack of observations of subsurface temperature collected over decades limits interpretation of the combined influences of surface warming and groundwater flow on subsurface thermal regimes. Subsurface temperature-depth profile data acquired for Kumamoto Plain, Japan, between 1987 and 2012 were collected and analyzed to elucidate regional groundwater and heat flows. The observed and simulated temperature-depth profiles showed the following: subsurface water flows from northeast to southwest in the study area; the combined influence of surface warming and water flow perturbation produces different temporal changes in thermal profiles in recharge, intermediate, and discharge areas; and aquifer thermal properties contribute more than hydraulic parameters to the perturbation of temperature-depth profiles. Spatial and temporal evolution features of subsurface thermal regimes may be utilized to investigate the influence of surface warming events on subsurface water and heat flows at the basin scale.

scholarly journals Formation of Concentrated Benthic Suspension in a Time-Dependent Salt Wedge Estuary

2018 ◽  
Vol 123 (11) ◽  
pp. 8581-8607 ◽  
Author(s):  
Jianzhong Ge ◽  
Zaiyang Zhou ◽  
Wanlun Yang ◽  
Pingxing Ding ◽  
Changsheng Chen ◽  
...  
Keyword(s):  
Time Dependent ◽  
Salt Wedge

scholarly journals Late Holocene temperature variability in Tasmania inferred from borehole temperature data

2017 ◽  
Vol 13 (6) ◽  
pp. 559-572 ◽  
Author(s):  
Asadusjjaman Suman ◽  
Fiona Dyer ◽  
Duanne White
Keyword(s):  
East Coast ◽  
Past Century ◽  
Borehole Data ◽  
Depth Profiles ◽  
The Past ◽  
North East ◽  
The North ◽  
Borehole Temperature ◽  
Temperature Depth

Abstract. Thirty-six borehole temperature–depth profiles were analysed to reconstruct the ground surface temperature history (GSTH) of eastern Tasmania for the past 5 centuries. We used the singular value decomposition method to invert borehole temperatures to produce temperature histories. The quality of borehole data was classified as high or low based on model misfit. The quality of the borehole data was not dependent on topography or land use. Analysis reveals that three to five high-quality borehole temperature–depth profiles were adequate to reconstruct robust paleotemperature records from any area. Average GSTH reconstructed from Tasmanian boreholes shows temperature increases about 1.2 ± 0.2 °C during the past 5 centuries. Reconstructed temperatures were consistent with meteorological records and other proxy records from Tasmania during their period of overlap. Temperature changes were greatest around the north-east coast and decreased towards the centre of Tasmania. The extension of the East Australian Current (EAC) further south and its strengthening around the north-east coast of Tasmania over the past century was considered a prime driver of warmer temperatures observed in north-east Tasmania.

scholarly journals Correction to “Planktonic growth and grazing in the Columbia River plume region: A biophysical model study”

2009 ◽  
Vol 114 ◽  
Author(s):  
N. S. Banas ◽  
E. J. Lessard ◽  
R. M. Kudela ◽  
P. MacCready ◽  
T. D. Peterson ◽  
...  
Keyword(s):  
Columbia River ◽  
River Plume ◽  
Biophysical Model ◽  
Planktonic Growth ◽  
Model Study ◽  
Plume Region ◽  
Columbia River Plume

Temporal patterns of fish and mesozooplankton near the Columbia River plume.

2009 ◽  
Vol 125 (4) ◽  
pp. 2551-2551
Author(s):  
Amanda M. Kaltenberg ◽  
Kelly J. Benoit‐Bird ◽  
Robert L. Emmett
Keyword(s):  
Columbia River ◽  
Temporal Patterns ◽  
River Plume ◽  
Columbia River Plume

Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf

1987 ◽  
Vol 24 (11) ◽  
pp. 2223-2234 ◽  
Author(s):  
Alan E. Taylor ◽  
Vic Allen
Keyword(s):  
Thermal Effects ◽  
Seasonal Changes ◽  
Sediment Cores ◽  
Deep Ocean ◽  
Regional Survey ◽  
Bottom Water Temperature ◽  
Depth Profiles ◽  
Wide Range ◽  
Temperature Depth ◽  
Thermal Conductivities

A regional survey of sediment temperatures and thermal conductivities was conducted at 33 stations across the outer shelf of the Canadian Beaufort Sea. Techniques developed for deep-ocean heat-flow investigations were used to study the upper 3 m of sediments. Temperature–depth profiles exhibit curvatures that may be explained by seasonal changes in bottom-water temperature; some curvatures may arise from other causes. It is unlikely that thermal effects of the underlying, degradational permafrost can be detected from such shallow temperatures because of the magnitude of, and lack of independent knowledge of, these transient and local influences. Thermal conductivities measured on sediment cores and corrected to −1 °C range from 0.9 to 2.4 W m−1 K−1 (average 1.26 ± 0.2 W m−1 K−1). These values are higher than typical conductivities of deep-ocean sediments. The wide range of thermal conductivities observed across the outer Beaufort Shelf may be explained by the presence of a varying fraction of quartz sand that represents a component of high conductivity.

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